Car, home, mailbox, work, and like a half-dozen keys to Dad's house. Theoretically I only need two keys for Dad's house, but for some reason the locks and the keys have worn down in odd ways so that ...

It depends on my key ring, but lots. Frequently I have two key rings at once. My daily key ring has car keys, house keys, tool box keys, workshop keys, and parents house keys (multiple bitings), while ...